diff --git a/.cirrus.yml b/.cirrus.yml
index 9f7f1dbc71..1d5531501d 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -301,16 +301,16 @@ ubsan_sanitizer_task:
     ZEEK_TAILORED_UB_CHECKS: 1
     UBSAN_OPTIONS: print_stacktrace=1
 
-tsan_sanitizer_task:
-  container:
-    # Just uses a recent/common distro to run memory error/leak checks.
-    dockerfile: ci/ubuntu-20.04/Dockerfile
-    cpu: 4
-    # AddressSanitizer uses a lot more memory than a typical config.
-    memory: 12GB
-  << : *CI_TEMPLATE
-  test_fuzzers_script: ./ci/test-fuzzers.sh
-  env:
-    CXXFLAGS: -DZEEK_DICT_DEBUG
-    ZEEK_CI_CONFIGURE_FLAGS: *TSAN_SANITIZER_CONFIG
-    ZEEK_CI_DISABLE_SCRIPT_PROFILING: 1
+# tsan_sanitizer_task:
+#   container:
+#     # Just uses a recent/common distro to run memory error/leak checks.
+#     dockerfile: ci/ubuntu-20.04/Dockerfile
+#     cpu: 4
+#     # AddressSanitizer uses a lot more memory than a typical config.
+#     memory: 12GB
+#   << : *CI_TEMPLATE
+#   test_fuzzers_script: ./ci/test-fuzzers.sh
+#   env:
+#     CXXFLAGS: -DZEEK_DICT_DEBUG
+#     ZEEK_CI_CONFIGURE_FLAGS: *TSAN_SANITIZER_CONFIG
+#     ZEEK_CI_DISABLE_SCRIPT_PROFILING: 1